<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>龙神</title>
        <style>
            div p{
                background-color: yellow;
            }
        </style>
    </head>
    <body>
        <div>
            <p>段落1 dv中</p>
            <p>段落2 dv中</p>
        </div>
        <p>段落3 非dv</p>
        <p>段落4 非dv</p>
    </body>
</html>